Object Oriented Design courses can help you learn principles like encapsulation, inheritance, and polymorphism, along with design patterns such as Singleton and Factory. You can build skills in creating reusable code, improving software maintainability, and designing systems that are easier to understand and extend. Many courses introduce tools like UML for modeling, as well as programming languages such as Java and Python, which are commonly used to implement object-oriented concepts in real-world applications.

EDUCBA
Skills you'll gain: Web Frameworks, Authentications, Application Frameworks, Web Applications, Web Development, Python Programming, Back-End Web Development, Maintainability, Unit Testing, Authorization (Computing), Identity and Access Management, Development Testing, Functional Testing, White-Box Testing, Application Security, Configuration Management, File Management
Advanced · Course · 1 - 3 Months

Duke University
Skills you'll gain: Environmental Issue, Team Building, Business Modeling, Entrepreneurship, Sustainable Business, Business Planning, New Business Development, Business Strategy, Innovation, Sustainable Design, Corporate Sustainability, Sustainable Development, Case Studies, Market Opportunities, Stakeholder Engagement
Beginner · Course · 1 - 3 Months

Skills you'll gain: User Interface (UI), Android (Operating System), UI Components, Interactive Design, Mobile Development Tools
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Interaction Design, User Interface (UI) Design, Code Reusability, Scalability, Web Applications, Data Management
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Content Strategy, Content Creation, Blogs, Content Optimization, Search Engine Optimization, Keyword Research, Web Content, Generative AI, Data Science
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Minitab, Process Capability, Statistical Process Controls, Statistical Hypothesis Testing, Data Visualization, Descriptive Statistics, Statistical Analysis, Statistical Software, Plot (Graphics), Statistics, Sampling (Statistics), Statistical Visualization, Process Analysis, Probability & Statistics, Probability Distribution, Statistical Modeling, Data Analysis, Statistical Methods, Performance Analysis, Exploratory Data Analysis
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Web Components, TypeScript, UI Components, Javascript, Maintainability, Web Development Tools, Web Applications, Front-End Web Development, Code Reusability, Cascading Style Sheets (CSS), Event-Driven Programming, Object Oriented Programming (OOP), Scalability
Beginner · Course · 1 - 4 Weeks

AI CERTs
Skills you'll gain: Customer Communications Management, Data Ethics, AI Integrations, Agentic Workflows, Quality Monitoring, Emerging Technologies
Beginner · Course · 1 - 3 Months

Coursera
Skills you'll gain: Collaborative Software, Data Sharing, Organizational Skills, Collaboration, User Accounts, Telecommuting, Teamwork, Graphic Design, Team Collaboration, Productivity, Content Marketing, Business Communication, Marketing Communications
Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: OSI Models, Computer Networking, Virtual Local Area Network (VLAN), Network Administration, Network Architecture, Network Infrastructure, Network Troubleshooting, General Networking, Wide Area Networks, Network Planning And Design, Local Area Networks, Cloud Computing, TCP/IP, Network Security, Threat Detection, Cloud Services, Network Protocols, Intrusion Detection and Prevention, Networking Hardware, Computer Security
Mixed · Course · 1 - 3 Months

Skills you'll gain: Content Marketing, Blogs, Copywriting, Content Creation, Content Optimization, Web Content, Content Strategy, Digital Content, Marketing Strategies, Search Engine Optimization, Marketing Communications, Persuasive Communication, Driving engagement, Brand Strategy, Web Analytics and SEO, Writing, Brand Awareness
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: MLOps (Machine Learning Operations), Applied Machine Learning, API Design, CI/CD, Software Quality Assurance, Code Review, Maintainability
Intermediate · Course · 1 - 4 Weeks